DE3326615A1 - TOOL OR TOOL HOLDER, IN PARTICULAR FOR CUTTING MACHINING ON NUMERICALLY CONTROLLED MACHINING CENTERS - Google Patents

Description

Tool or tool holder, especially for machining on numerically controlled Machining centers

The invention relates to a tool or to a tool holder, in particular for machining on numerically controlled machining centers, provide with a data carrier for various tool-specific characteristics such as length, diameter, service life or the like. Parameter.

With NC-controlled, automatic machining centers the tool-specific characteristics of the tool with tool holder in a known manner, e.g. in the form of a bar coding on adhesive labels, which are placed on the tool holder be glued on. The bar coding scanned with an optical reader, which feeds the data to the controller. This type of data carrier and data processing has disadvantages. On the one hand, the necessary optical readers are very sensitive, and not just to mechanical stress, but also in terms of pollution. There is also the risk that the adhesive label will become soiled or becomes detached, especially under the action of

- ψ- Ι oil is favored, which is definitely available in tools. Another disadvantage is the very limited storage capacity of stick-on labels of this type provided with bar coding; because the bar code cannot be of any length. Another disadvantage is that when the tool is worn, the label bearing the bar code cannot be seen whether it is a newly set tool coming from the measuring station or a used tool removed from the machining spindle. For safety reasons, when it has been removed from the machine spindle after the machining operation, the stick-on label with bar coding must be removed from every tool and a new label with current data in the form of bar coding must be stuck on. These manipulations are complex. In addition, the tool or the tool holder is smeared by remaining adhesive layers

The invention is based on the object of creating a tool or a tool holder in which the aforementioned Disadvantages of known data carriers in the form of bar-coded adhesive labels are avoided.

In the case of a tool or tool holder of the type mentioned in the preamble of claim 1, the object is according to the invention solved by the features in the characterizing part of claim 1. Advantageous further developments result from claims 2-7.

The advantages achieved in this way are in the special Description highlighted. To avoid repetition, reference is made to it, also because of other things Details and advantages of the invention. Advantageous In particular, it is also the fact that the invention dispenses with a direct connection of the measuring station to the control of the machining center, which means a great deal of effort power.

The full text of the claims is above not reproduced solely to avoid unnecessary repetition, but instead only by mentioning it Reference is made to it in the claim number, which, however, makes all of these claim features as at this point to apply expressly disclosed and essential to the invention to have.

The invention is explained in more detail below with reference to the drawing explained. Show it:

Fig. 1 is a schematic, partially sectioned

Side view 'of a part of a tool holder and a holding this

Gripper,

FIG. 2 shows a view of the tool holder in the direction of arrow II in FIG. 1.
20th

The schematically indicated tool holder 10 consists, for example, of a chuck for taps or other drills and is especially suitable for machining on numerically controlled, automatic machining centers thought.

The tool holder 10 has in the area where standardized Areas for attack by a gripper 11 are available, which enables the automatic tool change, e.g. from the tool

magazine in the spindle and back causes a diametrical blind hole 12 on.

The tool holder 10 is provided with a data carrier for various tool-specific characteristics of the structural unit consisting of the tool holder 10 and the inserted tool, such as length, diameter in the cutting area of the tool, service life and the like, other special parameters. This data carrier consists in a special design of a permanently installed, electrically erasable, programmable memory 13, also referred to as a so-called EEPRO ( ⁷ I. The memory 13 is soldered to one side of a printed circuit board 14, namely on the side that is at the bottom of the blind hole 12 On the other, externally accessible outer side of the printed circuit board 14 there are several, in the illustrated embodiment, a total of five contacts 15 to 19 which are insulated from one another and conductively connected to the memory 13 and which are designed here as contact surfaces.

In another exemplary embodiment, not shown, is each individual contact designed as a contact ring, the individual contact rings being arranged concentrically to one another are.

The Speieher 13 is protected within the blind hole 12, in which it can also be cast in plastic, for example. The contacts 15 and 16 serve e.g. for connection to a voltage supply, while the other contacts 17 to 19 for querying, deleting or setting of the memory 13 are determined. j

The memory 13 does not have its own power supply that it does not required. It is designed in such a way that it will hold itself even without a power supply.

The following is an example of an automatic, numerically controlled machining center that shows the handling of the Tool holder 10 with inserted tool existing

Assembly explained.

Before this assembly is in a tool magazine of the machining center is entered, there in a given place. - The structural unit is first measured at a measuring station.

This measuring station has, for example, a coaxial with the blind hole by means of a lifting magnet (not shown) 12 and to the memory 13 displaceable stamp

2Q, which has a carrier 21 at the front end in FIG has individual thin contact pins, vtin those in 2 only the ends of three contact pins 22, 23 and 24 can be seen, assigned to the contacts 15, 18 and 16 there. The contact pins are advantageously very small in diameter and consist of a second telescope-like against spring force in one another slidable parts, of which the most forward protruding part at the front end protruding axially Has teeth to break through dirt when touching and to achieve good electrical contact.

If the stamp 20 with carrier 21 and its contact pins in Fig. 2 to the left on the externally accessible side the printed circuit board 14 moves, so press the individual contact pins, each for itself, on the respectively assigned Contact 15 to 19, so that the contact is concerned. The memory 13 is connected to voltage via the contacts 15 and 16 placed. When measuring the unit consisting of tool holder and tool, not only the tool characteristics can itself., but also, for example, correction data required due to tool wear by setting the memory 13 in the Memory 13 can be entered.

After this, the assembly from tool holder 10 and inserted Tool with set memory 13, which is an integral part of the tool holder, the tool magazine of the NC machining center. When inserting

-I "

this assembly to the appropriate place in the tool magazine the individual data stored in the memory 13 are then transferred in the same way via a stamp 20 Interrogated carrier 21 and contact pins and transferred directly to the control of the machine. The insertion of the assembly into the tool magazine can be done manually or e.g. using the automatic tool changing device the machine that has a gripper located in the area of the vertical slide, the one with one gripper end engages the machining spindle and with its other end of the gripper that is in the tool change position of the tool magazine takes the new tool. This structural unit is used to place the structural unit in the tool magazine with the tool holder 10 e.g. inserted into the machining spindle and then the tool change based on this initiated via the gripper. During this process, a punch 20, which is seated directly on the gripper 11 with carrier 21 and contact pins 22 to 24 during the change, the query of the stored in memory 13, tool-specific data take place and at the same time the transfer and storage in the control of the NC-controlled Machining center.

The advantages of the training according to the invention are as follows.

All parameters and other tool-specific data that are required can be stored on the memory IC of the memory 13 are, save. The memory 13 has a large storage capacity of 16 × 16 bits, for example, which is a multiple the storage capacity e.g. of sticky labels, which - e.g. for food and other goods of need already known - are provided with bar coding. Since the memory 13 is an integral part of the tool holder 10, there is no risk of this data carrier being accidentally detached from the tool holder 10 and then the data belonging to the tool holder 10 are lost or mix-ups occur. Advantageous

is also that the memory 13 is otherwise protected against damage or contamination. Through training As an electrically erasable, programmable memory, it can be used without any manipulation or dismantling when required Overwritable at any time, i.e. it is first deleted and then set again with new data. Another advantage is that this opens up the possibility of using the data stored in memory 13, e.g. to be deleted automatically when the assembly of tool holder 10 and tool is introduced into the machining spindle was and has been in operation and then the tool change takes place. Then that would be accidental Re-entry of the structural unit in the tool magazine, with the risk that this tool is on the machine side is used again without being re-measured and adjusted after a certain service life, the structural unit when the memory 13 is queried, they cannot even be accepted by the tool changer that equips the magazine. The structural unit is therefore immediately sorted out as such, which is to be newly supplied to the measuring station where the memory is located • is set again with the new data, in particular correction data due to the tool. Since the memory 13 without its own Power supply holds itself, there is also no risk of stored, tool-specific Data just separate from this tool holder 10 with the tool inserted and then get lost.

Claims (1)

Expectations M. Ί Tool or tool holder, especially for machining on numerically controlled machining centers, provided with a data carrier for various tool-specific characteristics, such as length, diameter, service life or similar parameters, characterized in that the data carrier consists of a permanently installed electrically erasable programmable memory (13] (so-called EEPROM) is formed. 2. Tool or tool holder according to claim 1, characterized in that the memory (13) in a diametrical blind hole (12), preferably of the shaft is included. Tool or tool holder according to Claim 1 or 2, characterized in that the The memory (13) is arranged on one side of a carrier plate, in particular a printed circuit board (14), which is on on the other side several contacts, which are insulated from one another and are electrically conductively connected to the memory (13) (15 to 19). j- 4. Tool or tool holder according to claims 2 and 3, characterized in that the memory [13) is soldered onto the side of the carrier plate (14) facing the bottom of the blind hole C12) isjund that the contacts (15 to 19) on the outside accessible outside of the carrier plate (14) are arranged. 5. Tool or tool holder according to claim 3 or 4, characterized in that the individual contacts (15 to 19) consist of contact points. 6. Tool or tool holder according to claim 3 or 4, characterized in that the individual contacts are each designed as contact rings which are arranged concentrically to one another. 7. Tool or tool holder according to one of claims 1 to 6, characterized in n-e t, that the memory (13) is encapsulated within the blind hole (12) and, together with the carrier plate (14), cannot be lost is attached.